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ShutdownThread.javaAPI DocAndroid 5.1 API20778Thu Mar 12 22:22:42 GMT 2015com.android.server.power

ShutdownThread

public final class ShutdownThread extends Thread

Fields Summary
private static final String
TAG
private static final int
PHONE_STATE_POLL_SLEEP_MSEC
private static final int
MAX_BROADCAST_TIME
private static final int
MAX_SHUTDOWN_WAIT_TIME
private static final int
MAX_RADIO_WAIT_TIME
private static final int
SHUTDOWN_VIBRATE_MS
private static Object
sIsStartedGuard
private static boolean
sIsStarted
private static boolean
mReboot
private static boolean
mRebootSafeMode
private static String
mRebootReason
public static final String
SHUTDOWN_ACTION_PROPERTY
public static final String
REBOOT_SAFEMODE_PROPERTY
private static final ShutdownThread
sInstance
private static final android.media.AudioAttributes
VIBRATION_ATTRIBUTES
private final Object
mActionDoneSync
private boolean
mActionDone
private android.content.Context
mContext
private android.os.PowerManager
mPowerManager
private PowerManager.WakeLock
mCpuWakeLock
private PowerManager.WakeLock
mScreenWakeLock
private android.os.Handler
mHandler
private static android.app.AlertDialog
sConfirmDialog
Constructors Summary
private ShutdownThread()
Methods Summary
voidactionDone()

        synchronized (mActionDoneSync) {
            mActionDone = true;
            mActionDoneSync.notifyAll();
        }
private static voidbeginShutdownSequence(android.content.Context context)

        synchronized (sIsStartedGuard) {
            if (sIsStarted) {
                Log.d(TAG, "Shutdown sequence already running, returning.");
                return;
            }
            sIsStarted = true;
        }

        // throw up an indeterminate system dialog to indicate radio is
        // shutting down.
        ProgressDialog pd = new ProgressDialog(context);
        pd.setTitle(context.getText(com.android.internal.R.string.power_off));
        pd.setMessage(context.getText(com.android.internal.R.string.shutdown_progress));
        pd.setIndeterminate(true);
        pd.setCancelable(false);
        pd.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG);

        pd.show();

        sInstance.mContext = context;
        sInstance.mPowerManager = (PowerManager)context.getSystemService(Context.POWER_SERVICE);

        // make sure we never fall asleep again
        sInstance.mCpuWakeLock = null;
        try {
            sInstance.mCpuWakeLock = sInstance.mPowerManager.newWakeLock(
                    PowerManager.PARTIAL_WAKE_LOCK, TAG + "-cpu");
            sInstance.mCpuWakeLock.setReferenceCounted(false);
            sInstance.mCpuWakeLock.acquire();
        } catch (SecurityException e) {
            Log.w(TAG, "No permission to acquire wake lock", e);
            sInstance.mCpuWakeLock = null;
        }

        // also make sure the screen stays on for better user experience
        sInstance.mScreenWakeLock = null;
        if (sInstance.mPowerManager.isScreenOn()) {
            try {
                sInstance.mScreenWakeLock = sInstance.mPowerManager.newWakeLock(
                        PowerManager.FULL_WAKE_LOCK, TAG + "-screen");
                sInstance.mScreenWakeLock.setReferenceCounted(false);
                sInstance.mScreenWakeLock.acquire();
            } catch (SecurityException e) {
                Log.w(TAG, "No permission to acquire wake lock", e);
                sInstance.mScreenWakeLock = null;
            }
        }

        // start the thread that initiates shutdown
        sInstance.mHandler = new Handler() {
        };
        sInstance.start();
public static voidreboot(android.content.Context context, java.lang.String reason, boolean confirm)
Request a clean shutdown, waiting for subsystems to clean up their state etc. Must be called from a Looper thread in which its UI is shown.

param
context Context used to display the shutdown progress dialog.
param
reason code to pass to the kernel (e.g. "recovery"), or null.
param
confirm true if user confirmation is needed before shutting down.

        mReboot = true;
        mRebootSafeMode = false;
        mRebootReason = reason;
        shutdownInner(context, confirm);
public static voidrebootOrShutdown(boolean reboot, java.lang.String reason)
Do not call this directly. Use {@link #reboot(Context, String, boolean)} or {@link #shutdown(Context, boolean)} instead.

param
reboot true to reboot or false to shutdown
param
reason reason for reboot

        if (reboot) {
            Log.i(TAG, "Rebooting, reason: " + reason);
            PowerManagerService.lowLevelReboot(reason);
            Log.e(TAG, "Reboot failed, will attempt shutdown instead");
        } else if (SHUTDOWN_VIBRATE_MS > 0) {
            // vibrate before shutting down
            Vibrator vibrator = new SystemVibrator();
            try {
                vibrator.vibrate(SHUTDOWN_VIBRATE_MS, VIBRATION_ATTRIBUTES);
            } catch (Exception e) {
                // Failure to vibrate shouldn't interrupt shutdown.  Just log it.
                Log.w(TAG, "Failed to vibrate during shutdown.", e);
            }

            // vibrator is asynchronous so we need to wait to avoid shutting down too soon.
            try {
                Thread.sleep(SHUTDOWN_VIBRATE_MS);
            } catch (InterruptedException unused) {
            }
        }

        // Shutdown power
        Log.i(TAG, "Performing low-level shutdown...");
        PowerManagerService.lowLevelShutdown();
public static voidrebootSafeMode(android.content.Context context, boolean confirm)
Request a reboot into safe mode. Must be called from a Looper thread in which its UI is shown.

param
context Context used to display the shutdown progress dialog.
param
confirm true if user confirmation is needed before shutting down.

        mReboot = true;
        mRebootSafeMode = true;
        mRebootReason = null;
        shutdownInner(context, confirm);
public voidrun()
Makes sure we handle the shutdown gracefully. Shuts off power regardless of radio and bluetooth state if the alloted time has passed.

        BroadcastReceiver br = new BroadcastReceiver() {
            @Override public void onReceive(Context context, Intent intent) {
                // We don't allow apps to cancel this, so ignore the result.
                actionDone();
            }
        };

        /*
         * Write a system property in case the system_server reboots before we
         * get to the actual hardware restart. If that happens, we'll retry at
         * the beginning of the SystemServer startup.
         */
        {
            String reason = (mReboot ? "1" : "0") + (mRebootReason != null ? mRebootReason : "");
            SystemProperties.set(SHUTDOWN_ACTION_PROPERTY, reason);
        }

        /*
         * If we are rebooting into safe mode, write a system property
         * indicating so.
         */
        if (mRebootSafeMode) {
            SystemProperties.set(REBOOT_SAFEMODE_PROPERTY, "1");
        }

        Log.i(TAG, "Sending shutdown broadcast...");
        
        // First send the high-level shut down broadcast.
        mActionDone = false;
        Intent intent = new Intent(Intent.ACTION_SHUTDOWN);
        intent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND);
        mContext.sendOrderedBroadcastAsUser(intent,
                UserHandle.ALL, null, br, mHandler, 0, null, null);
        
        final long endTime = SystemClock.elapsedRealtime() + MAX_BROADCAST_TIME;
        synchronized (mActionDoneSync) {
            while (!mActionDone) {
                long delay = endTime - SystemClock.elapsedRealtime();
                if (delay <= 0) {
                    Log.w(TAG, "Shutdown broadcast timed out");
                    break;
                }
                try {
                    mActionDoneSync.wait(delay);
                } catch (InterruptedException e) {
                }
            }
        }
        
        Log.i(TAG, "Shutting down activity manager...");
        
        final IActivityManager am =
            ActivityManagerNative.asInterface(ServiceManager.checkService("activity"));
        if (am != null) {
            try {
                am.shutdown(MAX_BROADCAST_TIME);
            } catch (RemoteException e) {
            }
        }

        Log.i(TAG, "Shutting down package manager...");

        final PackageManagerService pm = (PackageManagerService)
            ServiceManager.getService("package");
        if (pm != null) {
            pm.shutdown();
        }

        // Shutdown radios.
        shutdownRadios(MAX_RADIO_WAIT_TIME);

        // Shutdown MountService to ensure media is in a safe state
        IMountShutdownObserver observer = new IMountShutdownObserver.Stub() {
            public void onShutDownComplete(int statusCode) throws RemoteException {
                Log.w(TAG, "Result code " + statusCode + " from MountService.shutdown");
                actionDone();
            }
        };

        Log.i(TAG, "Shutting down MountService");

        // Set initial variables and time out time.
        mActionDone = false;
        final long endShutTime = SystemClock.elapsedRealtime() + MAX_SHUTDOWN_WAIT_TIME;
        synchronized (mActionDoneSync) {
            try {
                final IMountService mount = IMountService.Stub.asInterface(
                        ServiceManager.checkService("mount"));
                if (mount != null) {
                    mount.shutdown(observer);
                } else {
                    Log.w(TAG, "MountService unavailable for shutdown");
                }
            } catch (Exception e) {
                Log.e(TAG, "Exception during MountService shutdown", e);
            }
            while (!mActionDone) {
                long delay = endShutTime - SystemClock.elapsedRealtime();
                if (delay <= 0) {
                    Log.w(TAG, "Shutdown wait timed out");
                    break;
                }
                try {
                    mActionDoneSync.wait(delay);
                } catch (InterruptedException e) {
                }
            }
        }

        rebootOrShutdown(mReboot, mRebootReason);
public static voidshutdown(android.content.Context context, boolean confirm)
Request a clean shutdown, waiting for subsystems to clean up their state etc. Must be called from a Looper thread in which its UI is shown.

param
context Context used to display the shutdown progress dialog.
param
confirm true if user confirmation is needed before shutting down.

        mReboot = false;
        mRebootSafeMode = false;
        shutdownInner(context, confirm);
static voidshutdownInner(android.content.Context context, boolean confirm)

        // ensure that only one thread is trying to power down.
        // any additional calls are just returned
        synchronized (sIsStartedGuard) {
            if (sIsStarted) {
                Log.d(TAG, "Request to shutdown already running, returning.");
                return;
            }
        }

        final int longPressBehavior = context.getResources().getInteger(
                        com.android.internal.R.integer.config_longPressOnPowerBehavior);
        final int resourceId = mRebootSafeMode
                ? com.android.internal.R.string.reboot_safemode_confirm
                : (longPressBehavior == 2
                        ? com.android.internal.R.string.shutdown_confirm_question
                        : com.android.internal.R.string.shutdown_confirm);

        Log.d(TAG, "Notifying thread to start shutdown longPressBehavior=" + longPressBehavior);

        if (confirm) {
            final CloseDialogReceiver closer = new CloseDialogReceiver(context);
            if (sConfirmDialog != null) {
                sConfirmDialog.dismiss();
            }
            sConfirmDialog = new AlertDialog.Builder(context)
                    .setTitle(mRebootSafeMode
                            ? com.android.internal.R.string.reboot_safemode_title
                            : com.android.internal.R.string.power_off)
                    .setMessage(resourceId)
                    .setPositiveButton(com.android.internal.R.string.yes, new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int which) {
                            beginShutdownSequence(context);
                        }
                    })
                    .setNegativeButton(com.android.internal.R.string.no, null)
                    .create();
            closer.dialog = sConfirmDialog;
            sConfirmDialog.setOnDismissListener(closer);
            sConfirmDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG);
            sConfirmDialog.show();
        } else {
            beginShutdownSequence(context);
        }
private voidshutdownRadios(int timeout)

        // If a radio is wedged, disabling it may hang so we do this work in another thread,
        // just in case.
        final long endTime = SystemClock.elapsedRealtime() + timeout;
        final boolean[] done = new boolean[1];
        Thread t = new Thread() {
            public void run() {
                boolean nfcOff;
                boolean bluetoothOff;
                boolean radioOff;

                final INfcAdapter nfc =
                        INfcAdapter.Stub.asInterface(ServiceManager.checkService("nfc"));
                final ITelephony phone =
                        ITelephony.Stub.asInterface(ServiceManager.checkService("phone"));
                final IBluetoothManager bluetooth =
                        IBluetoothManager.Stub.asInterface(ServiceManager.checkService(
                                BluetoothAdapter.BLUETOOTH_MANAGER_SERVICE));

                try {
                    nfcOff = nfc == null ||
                             nfc.getState() == NfcAdapter.STATE_OFF;
                    if (!nfcOff) {
                        Log.w(TAG, "Turning off NFC...");
                        nfc.disable(false); // Don't persist new state
                    }
                } catch (RemoteException ex) {
                Log.e(TAG, "RemoteException during NFC shutdown", ex);
                    nfcOff = true;
                }

                try {
                    bluetoothOff = bluetooth == null || !bluetooth.isEnabled();
                    if (!bluetoothOff) {
                        Log.w(TAG, "Disabling Bluetooth...");
                        bluetooth.disable(false);  // disable but don't persist new state
                    }
                } catch (RemoteException ex) {
                    Log.e(TAG, "RemoteException during bluetooth shutdown", ex);
                    bluetoothOff = true;
                }

                try {
                    radioOff = phone == null || !phone.needMobileRadioShutdown();
                    if (!radioOff) {
                        Log.w(TAG, "Turning off cellular radios...");
                        phone.shutdownMobileRadios();
                    }
                } catch (RemoteException ex) {
                    Log.e(TAG, "RemoteException during radio shutdown", ex);
                    radioOff = true;
                }

                Log.i(TAG, "Waiting for NFC, Bluetooth and Radio...");

                while (SystemClock.elapsedRealtime() < endTime) {
                    if (!bluetoothOff) {
                        try {
                            bluetoothOff = !bluetooth.isEnabled();
                        } catch (RemoteException ex) {
                            Log.e(TAG, "RemoteException during bluetooth shutdown", ex);
                            bluetoothOff = true;
                        }
                        if (bluetoothOff) {
                            Log.i(TAG, "Bluetooth turned off.");
                        }
                    }
                    if (!radioOff) {
                        try {
                            radioOff = !phone.needMobileRadioShutdown();
                        } catch (RemoteException ex) {
                            Log.e(TAG, "RemoteException during radio shutdown", ex);
                            radioOff = true;
                        }
                        if (radioOff) {
                            Log.i(TAG, "Radio turned off.");
                        }
                    }
                    if (!nfcOff) {
                        try {
                            nfcOff = nfc.getState() == NfcAdapter.STATE_OFF;
                        } catch (RemoteException ex) {
                            Log.e(TAG, "RemoteException during NFC shutdown", ex);
                            nfcOff = true;
                        }
                        if (nfcOff) {
                            Log.i(TAG, "NFC turned off.");
                        }
                    }

                    if (radioOff && bluetoothOff && nfcOff) {
                        Log.i(TAG, "NFC, Radio and Bluetooth shutdown complete.");
                        done[0] = true;
                        break;
                    }
                    SystemClock.sleep(PHONE_STATE_POLL_SLEEP_MSEC);
                }
            }
        };

        t.start();
        try {
            t.join(timeout);
        } catch (InterruptedException ex) {
        }
        if (!done[0]) {
            Log.w(TAG, "Timed out waiting for NFC, Radio and Bluetooth shutdown.");
        }